Weather Alert in Colorado
Tornado Warning issued September 13 at 2:09PM MDT until September 13 at 2:45PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Dolores, CO; Montezuma, CO; San Juan, UT
DESCRIPTION: TORGJT The National Weather Service in Grand Junction has issued a * Tornado Warning for... Southwestern Dolores County in southwestern Colorado... Northwestern Montezuma County in southwestern Colorado... East central San Juan County in southeastern Utah... * Until 245 PM MDT. * At 209 PM MDT, a confirmed tornado was located 18 miles north of Aneth, or 26 miles southeast of Blanding, moving northeast at 15 mph. HAZARD...Damaging tornado and quarter size hail. SOURCE...Emergency management confirmed tornado. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. * This tornadic thunderstorm will remain over mainly rural areas of southwestern Dolores, northwestern Montezuma and east central San Juan Counties, including the following locations... Hovenweep National Monument.
INSTRUCTION: To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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